/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/BuchiAutomizerCInline.xml -s ../../../trunk/examples/settings/buchiAutomizer/concurrent-automaton-noLbe.epf -i ../../../trunk/examples/svcomp/pthread-complex/bounded_buffer.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-21b0908 [2022-07-22 11:41:14,276 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 11:41:14,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 11:41:14,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-07-22 11:41:14,404 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 11:41:14,407 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 11:41:14,410 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 11:41:14,418 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 11:41:14,419 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 11:41:14,421 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 11:41:14,425 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 11:41:14,436 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 11:41:14,440 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 11:41:14,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 11:41:14,443 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 11:41:14,446 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 11:41:14,448 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 11:41:14,456 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-07-22 11:41:14,470 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 11:41:14,473 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 11:41:14,476 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 11:41:14,478 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/buchiAutomizer/concurrent-automaton-noLbe.epf [2022-07-22 11:41:14,537 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 11:41:14,538 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 11:41:14,538 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 11:41:14,538 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 11:41:14,540 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 11:41:14,540 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 11:41:14,541 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 11:41:14,541 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-07-22 11:41:14,541 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-07-22 11:41:14,541 INFO L138 SettingsManager]: * Use old map elimination=false [2022-07-22 11:41:14,542 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-07-22 11:41:14,542 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-07-22 11:41:14,542 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-07-22 11:41:14,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 11:41:14,543 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 11:41:14,543 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-22 11:41:14,543 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 11:41:14,543 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 11:41:14,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 11:41:14,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-07-22 11:41:14,544 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-07-22 11:41:14,544 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-07-22 11:41:14,545 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 11:41:14,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 11:41:14,545 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-07-22 11:41:14,545 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 11:41:14,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-07-22 11:41:14,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 11:41:14,546 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 11:41:14,546 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 11:41:14,547 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 11:41:14,547 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 11:41:14,548 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-07-22 11:41:14,549 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-07-22 11:41:14,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 11:41:15,007 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 11:41:15,010 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 11:41:15,012 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 11:41:15,013 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 11:41:15,015 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-complex/bounded_buffer.i [2022-07-22 11:41:15,118 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e151b6383/3ecc0b4e45a74549a5dfbbd66ab11978/FLAG9f360cb69 [2022-07-22 11:41:15,965 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 11:41:15,965 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/bounded_buffer.i [2022-07-22 11:41:16,007 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e151b6383/3ecc0b4e45a74549a5dfbbd66ab11978/FLAG9f360cb69 [2022-07-22 11:41:16,110 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e151b6383/3ecc0b4e45a74549a5dfbbd66ab11978 [2022-07-22 11:41:16,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 11:41:16,120 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-07-22 11:41:16,122 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 11:41:16,122 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 11:41:16,126 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 11:41:16,127 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:41:16" (1/1) ... [2022-07-22 11:41:16,129 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39f5f13b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:16, skipping insertion in model container [2022-07-22 11:41:16,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:41:16" (1/1) ... [2022-07-22 11:41:16,137 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 11:41:16,194 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 11:41:17,260 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/bounded_buffer.i[70002,70015] [2022-07-22 11:41:17,326 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:41:17,340 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 11:41:17,499 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/bounded_buffer.i[70002,70015] [2022-07-22 11:41:17,517 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:41:17,689 INFO L208 MainTranslator]: Completed translation [2022-07-22 11:41:17,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:17 WrapperNode [2022-07-22 11:41:17,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 11:41:17,691 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 11:41:17,692 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 11:41:17,692 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 11:41:17,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:17" (1/1) ... [2022-07-22 11:41:17,772 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:17" (1/1) ... [2022-07-22 11:41:17,856 INFO L137 Inliner]: procedures = 428, calls = 126, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 471 [2022-07-22 11:41:17,856 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 11:41:17,857 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 11:41:17,857 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 11:41:17,857 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 11:41:17,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:17" (1/1) ... [2022-07-22 11:41:17,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:17" (1/1) ... [2022-07-22 11:41:17,874 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:17" (1/1) ... [2022-07-22 11:41:17,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:17" (1/1) ... [2022-07-22 11:41:17,897 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:17" (1/1) ... [2022-07-22 11:41:17,905 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:17" (1/1) ... [2022-07-22 11:41:17,909 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:17" (1/1) ... [2022-07-22 11:41:17,924 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 11:41:17,925 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 11:41:17,925 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 11:41:17,925 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 11:41:17,926 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:17" (1/1) ... [2022-07-22 11:41:17,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 11:41:17,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:41:17,966 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 11:41:17,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2022-07-22 11:41:18,025 INFO L130 BoogieDeclarations]: Found specification of procedure producer_routine [2022-07-22 11:41:18,026 INFO L138 BoogieDeclarations]: Found implementation of procedure producer_routine [2022-07-22 11:41:18,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 11:41:18,026 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 11:41:18,026 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-22 11:41:18,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 11:41:18,026 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2022-07-22 11:41:18,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 11:41:18,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-22 11:41:18,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 11:41:18,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 11:41:18,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 11:41:18,028 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-22 11:41:18,028 INFO L130 BoogieDeclarations]: Found specification of procedure consumer_routine [2022-07-22 11:41:18,028 INFO L138 BoogieDeclarations]: Found implementation of procedure consumer_routine [2022-07-22 11:41:18,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 11:41:18,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 11:41:18,030 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 11:41:18,217 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 11:41:18,220 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 11:41:19,221 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 11:41:19,234 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 11:41:19,235 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2022-07-22 11:41:19,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:41:19 BoogieIcfgContainer [2022-07-22 11:41:19,238 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 11:41:19,239 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-07-22 11:41:19,239 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-07-22 11:41:19,244 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-07-22 11:41:19,245 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-22 11:41:19,245 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 22.07 11:41:16" (1/3) ... [2022-07-22 11:41:19,246 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2e216667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.07 11:41:19, skipping insertion in model container [2022-07-22 11:41:19,247 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-22 11:41:19,247 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:41:17" (2/3) ... [2022-07-22 11:41:19,247 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2e216667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.07 11:41:19, skipping insertion in model container [2022-07-22 11:41:19,247 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-22 11:41:19,248 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:41:19" (3/3) ... [2022-07-22 11:41:19,249 INFO L322 chiAutomizerObserver]: Analyzing ICFG bounded_buffer.i [2022-07-22 11:41:19,508 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-22 11:41:19,556 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 447 places, 498 transitions, 1018 flow [2022-07-22 11:41:20,054 INFO L129 PetriNetUnfolder]: 125/1087 cut-off events. [2022-07-22 11:41:20,054 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-22 11:41:20,097 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1107 conditions, 1087 events. 125/1087 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 6528 event pairs, 0 based on Foata normal form. 0/959 useless extension candidates. Maximal degree in co-relation 571. Up to 16 conditions per place. [2022-07-22 11:41:20,097 INFO L82 GeneralOperation]: Start removeDead. Operand has 447 places, 498 transitions, 1018 flow [2022-07-22 11:41:20,185 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 447 places, 498 transitions, 1018 flow [2022-07-22 11:41:20,202 INFO L300 stractBuchiCegarLoop]: Interprodecural is true [2022-07-22 11:41:20,202 INFO L301 stractBuchiCegarLoop]: Hoare is false [2022-07-22 11:41:20,203 INFO L302 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-07-22 11:41:20,203 INFO L303 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-07-22 11:41:20,203 INFO L304 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-07-22 11:41:20,203 INFO L305 stractBuchiCegarLoop]: Difference is false [2022-07-22 11:41:20,203 INFO L306 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-07-22 11:41:20,203 INFO L310 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2022-07-22 11:41:20,206 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand currently 0 states, but on-demand construction may add more states Received shutdown request... [2022-07-22 11:43:56,134 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-07-22 11:43:57,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown